During the manufacture of flat glass by the float process, the glass surface which has been in contact with the molten tin is treated with a gaseous halogen reagent for a sufficient time and at a sufficient temperature to render harmless those impurities which have entered the glass surface as a result of having been in contact with the molten tin, the polished glass surface being preserved.
Origin
Unknown
Journal Title
(B.P. 1, 107,883, 27.3.68)
Sector
Primary Papers
Class
PP 518